电网技术Issue(4)：899-903,5.DOI:10.13335/j.1000-3673.pst.2015.04.004
磷酸铁锂电池容量衰退轨迹分析方法
Capacity Fading and Degradation Mechanism of A123 Battery
摘要
Abstract
Taking the 2200 mA⋅h lithium iron phosphate (LiFePO4, LFP) battery manufactured by A123 systems Inc. as research object, 3500 cycles of fully charged and discharged test for 2 200 mA⋅h LFP battery is performed under the current rate of 3C at the ambient temperature of 25℃, meanwhile the test is interrupted after every 200 cycles, and at this point the charging and discharging under the current rate of 1C, the fading of resistance and internal resistance of the battery and the open circuit voltage-state of charge (OCV-SOC) curve as well as the peak curve variation of dQ/dV under the current rate of 1/20C are measured. To validate above-mentioned method to analyze the capacity fading mechanism, the A123 2200 mA⋅h LFP battery underwent full test cycle is disassembled in the glove box and reassembled as the button half-cell, and the test results of the half-cell with positive polarity and that with negative polarity as well as the analysis on the capacity matching before and after the disassembly show that the proposed analysis method for the capacity fading of LFP battery is correct and effective.关键词
循环寿命/磷酸铁锂电池/A123电池/容量衰退/拆解半电池Key words
cycle life/lithium iron phosphate battery/A123 battery/capacity fading/dismantling half cell分类
信息技术与安全科学引用本文复制引用
时玮,姜久春,张言茹,杨玉青,段瑶娟,刁伟萍..磷酸铁锂电池容量衰退轨迹分析方法[J].电网技术,2015,(4):899-903,5.基金项目
国家国际科技合作专项(2013DFA60930)；中央高校基本科研业务费专项资金项目(2010JBZ002)。基金项目国家国际科技合作专项(2013DFA60930)；中央高校基本科研业务费专项资金项目(2010JBZ002)。Project Supported by International S&T Cooperation Program of China (2013DFA60930) （2013DFA60930）
Fundamental Research Funds for the Central Universities (2010JBZ002) （2010JBZ002）
